Engine supercharger



h F. A. PUDGE ENGINE SUPERCHARGER June 5, 1945.

Filed July 11-, 1944- 2 SheetsSheet l FIG.|

5/ K. Tul'lllllllllllll' IIIIII."IAIIIIII.I- llllllllllqlllllll-lllla-llllllll llllllldql ll'lllu Z O q::;:.".:: 28 I II 'I I: I IF {I l l 'i l '1 'l I l I I 1 I I 1 Ir I INVENTORQ FREDERICK A. PUDGE ATTORNEYS June 5, 1945. FA. PUDGE ENGINE SUfEHCHARGER 2 Sheets-Sheet 2 Filed July ll, 1944 FREDERICK A PUDGE ATTORNEYS Patented June s, 1945 imam surnncnsnona Frederick A. Pudge, Boise, Idaho,' assignor to Nevada Engine Corporation, Winnemucca, Nev., a corporation of Nevada Application'July 11, 1944, Serial No. 544,443

. 1 Claim.

The present invention relates to superchargers or means for forcing air into internal combustion engines. I

Heretofore in devices for supplying air to engines it has been customary to use devices such as fans or blowers involving rotary elements and, since such devices must frequently operate at extremely high speeds, difficulties of one sort or another are encountered.

Among the objects of the present invention is to eliminate rapidly rotating parts and thus do away with hearing and out-of-balance troubles.-

Another object is a supercharger or air supply means which may be operated at low as well as high speeds to supply air to engines of the fuel injection type.

ries on its under side a suitable valve or diaphragm 29, fixed at two or more of its edges t plate and also provided with a plurality of openings 29A so arranged as not to register with openings 28A.

The plate 21 is fixed to the engine and is likewise provided with a plurality of openings 21A passing through the plate and opening into a sun other objects will readily occur to those 4' skilled in the art upon reference to the following description and the accompanying drawings in which Figure 1 illustrates more or less diagrammati-' cally an engine with opposed pistons and showing an application of the supercharger, parts being shown in section.

Figure 2 shows a part of Figure 1 somewhat enlarged.

Figure 3 is a view in elevation of one ofthe devices.

In the drawings, Figure 1 shows a sectional view of an opposed piston type of engine, the cylinder I having therein a pair of pistons H, actuating ilalitable crankshafts l2 through connecting rods In this figure, the pistons II are shown at the end of their outward movement with the com- 7 bustion space between them. The figure also the cleaning of the entering air is an important,

shows passages I6 leading out of the cylinder into a manifold or manifolds lI. These are the exhaust passages.

The air inlet passages are indicated at 20 and as coming into the cylinder from a plurality of bellows type compressors 25.

These compressors "may be identical in form and size or may difler somewhat in size or shape depending upon considerations of space and losuitable chamber 30, in turn opening into a passage 20, tlise'openings being valved by means of a second diaphragm 3| fixed at its edges to the underside of plate 2'! and provided wi'th suitable openings 3 IA arranged in non-registry-with open-.

ings HA. I

Surrounding the perforated areas of plates 2-6 and 21 and fixed to the latter and to hinge 26B is a collapsible and distendable bellowsidiaphragm '35 reinforced, if desired, with suitable cords or wires 35A,'the whole assembly of plates and diaphragms being heat insulated as indicated at 40 by suitable material, and secured to theengine in a suitable fashion as indicated by lugs 4|.

In the specific application of the device shown in Figure 1, the inlet passages 20 and exhaust passages I! are covered by the piston l 1 until near the ends of the outward stroke of the pistons and accordingly the drive of the plates 26 should be so arranged as to fully collapse the bellow 35 at or just before these passages are uncovered by the pistons. In other types of engine, of course, a different timing of the bellows operation may be used.

In the use of the present device on an engine,

consideration and it is proposed to accomplish this in any easy practical manner by placing over each bellows or group. of bellows a housing member 50-. This will be in the form of an enclosing metallic box provided in its outer wall with suitable air inlet openings 5| which lead the air into and through a suitable flat filter 52 carried cation. Each, however, consists of an oscillatable plate 26 hinged at one end as at 283 by means. of an air-tight hinge of suitable flexible material, such as rubber, fixed to the plate 28 and to the stationary base plate 21. The free end of the plate 26 is connected through connecting rods 2! to a suitable actuating portion of the engine such as the crankshaft l2.

The plate 26 is. provided with a large number of openings 26A passing through the plate and carupon the inner face of the wall. Near one end the housing ill will be provided with a wall or partitions IDA-having slots 54 for the ears 53, connected to the connectingrods 28.

As indicated in Figure 1, a single housing 503 may be used to cover two or more bellows. e

In applying the housing W to the bellows it is preferred to curve the slotted end wall and arrange it closely adjacent the diaphragm 35 so as to provide a reinforcement of the latter against 3 the considerable pressure that builds up within the bellows. The housing will also serve as a safety member by preventing contact of the person with the rapidly oscillating plate 26 or rods 28.

In making the present device the hinge 26B, dlaphragms 2|, II, and 35 will be made of any suitable material, such as one of the heat resisting forms of synthetic rubber.

By the use of the bellows type of compressor it is obvious that there can be no dynamic balance diiilculties such as may be encountered in rapidly rotating parts but, of course, oppositely placed bellows should be at least statically balanced.

Now having described the invention and the preferred embodiment thereof, it is to be understood that said invention is to be limited not to 'the specific details herein set forth, but only by means consisting of a bellows having a stationary plate fixed to said engine structure, an oscillatable plate hinged thereto, means connecting the latter plate in operative relation to a movin part of said engine, valved air inlet means carried by said osclllatable plate, valved air outlet means means carried by said stationary plate, a bellows diaphragm sealed to said plates around the valve areas, heat insulating means between said stationary plate and the engine structure, and a housing for said bellows having a wall arranged'closely adjacent the outer surface of said diaphragm, said housing being provided with air inlet means and means for filtering the in- 16 coming air.

FREDERICK A. FUDGE. 

